Damage Calculator

Enter your operator's final ATK and the multipliers on a hit — skill %, crit, DMG bonus — plus the enemy's DEF and RES, and this tool returns the damage per hit (non-crit, crit, and average). It uses the official Endfield multiplicative damage formula so you can compare builds without a spreadsheet.

Use it when you are deciding a build: which weapon or essence set hits harder, whether more Crit or more ATK% is your bigger upgrade, or how much a support's DMG buff is actually worth. Plug two setups in and compare the average per hit.

1. Final ATK: your operator's ATK shown in-game (already includes weapon + buffs).
2. Skill multiplier (%): the % listed on the skill you are testing.
3. DMG bonus (%): your combined damage-up buffs as one number.
4. Crit Rate / Crit DMG (%): operators start at 5% / 50%.
5. Enemy DEF / RES (%): the target's defense and resistance (negative RES from shred amplifies your damage).

• Average / hit — the number to compare builds with: it already weights crit and non-crit by your crit rate.
• Non-crit hit / Crit hit — the low and high ends of a single swing.
• DEF multiplier / RES multiplier — how much the enemy's defense and resistance cut (or amplify) your damage, shown transparently.

Endfield damage is multiplicative — every term multiplies, so mixing different buff types beats stacking one:

Damage = ATK × Skill% × (1 + DMG bonus) × Crit × DEF mult × RES mult

• DEF mult = 100 / (DEF + 100) for DEF ≥ 0. An enemy with 100 DEF takes ×0.5; negative DEF (armor break) amplifies.
• Crit hit = ×(1 + Crit DMG). Average = ×(1 + Crit Rate × Crit DMG). Base is 5% / 50%.
• RES mult = 1 − RES%. Negative resistance (shred) pushes it above 1.